The importance of correct implants positioning and masticatory load direction on a fixed prosthesis
João-Paulo-Mendes Tribst1, Vinicius-Aneas Rodrigues2, Amanda-Maria-de Oliveira Dal Piva1
1DDs, MSc, PhD Student in Prosthodontics, Department of Dental Materials and Proshodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos / SP, Brazil. Address: Av Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos, São Paulo, Brazil.
Journal of Clinical and Experimental Dentistry
|April 20, 2018
Summary
Inclined dental implants exhibit more damaging biomechanical behavior than straight implants, potentially leading to unwanted bone remodeling. This study validates the finite element analysis model for evaluating implant stress and strain.
Area of Science:
- Biomaterials and Biomechanics
- Dental Implantology
- Finite Element Analysis
Background:
- Biomechanical studies of dental implants are crucial for understanding load dissipation and ensuring osseointegration longevity.
- External hexagon implants are commonly used, but their response to various loading conditions requires detailed analysis.
Purpose of the Study:
- To evaluate microstrains around external hexagon implants under axial and non-axial loads.
- To compare the biomechanical behavior of straight implants versus implants inclined at 17° in a fixed prosthesis.
Main Methods:
- Utilized CAD and CAE software to model straight and 17° inclined implants within a simulated bone block.
- Applied axial and non-axial loads to a fixed prosthesis and analyzed stress and strain using finite element analysis (FEA).
- Validated the FEA model through an in vitro experiment using strain gauges.
Main Results:
- FEA results correlated well with experimental strain gauge data, validating the model.
- The group with inclined implants demonstrated significantly more damaging biomechanical behavior (P<0.005) compared to the straight implant group.
Conclusions:
- The finite element analysis model is a valid tool for biomechanical assessment of dental implants.
- Inclined implants can induce detrimental biomechanical effects, potentially leading to unwanted bone remodeling.
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